Port Numbers Flashcards
Ports and their Usage
What is port 20 used for?
File Transfer Protocol (FTP) Data Transfer
What is port 21 used for?
File Transfer Protocol (FTP) Command Control
What is port 22 used for?
Secure Shell (SSH)
What is port 23 used for?
Telnet - Remote login service, unencrypted text messages
What is port 25 used for?
Simple Mail Transfer Protocol (SMTP) E-Mail Routing
What is port 53 used for?
Domain Name System (DNS) service
What is port 68 used for?
Domain host configuration protocol (DHCP)
What is port 69 used for?
Trivial File Transfer Protocol (TFTP)
What is port 80 used for?
Hypertext Transfer Protocol (HTTP) used in World Wide Web
What is port 110 used for?
Post Office Protocol (POP3) used by e-mail clients to retrieve e-mail from a server
What is port 143 used for?
Internet Message Access Protocol (IMAP) Management of Digital Mail
What is port 443 used for?
HTTP Secure (HTTPS) HTTP over TLS/SSL
What is port 465 used for?
Simple Mail Transfer Protocol Secure (SMTPS) E-mail Routing
What are ports 989 and 990 used for?
File Transfer Protocol Secure (FTPS) Data Transfer
What is port 993 used for?
Internet Message Access Protocol Secure (IMAPS) Management of Digital Mail
What is port 995 used for?
Post Office Protocol Secure (POPs3) used by e-mail clients to retrieve e-mail from a server
What is port 3389 used for?
Remote Desktop Protocol (RDP)
Which ports are secure?
22
443
465
989/990
993
995
